Senior Backend Engineer, GenAI

The role

This role involves designing, building, and owning production LLM agent systems end-to-end. You will work on real-time voice agents, knowledge base structures, and scalable backend services.

What you will do

• Design, build, and own production LLM agent systems end-to-end
• Work on real-time voice agent conversational problems
• Shape the next generation of the knowledge base
• Ship changes as controlled experiments and measure them against an in-house eval platform
• Track cost per conversation across millions of LLM calls
• Own model context, limits, and guardrails
• Build and operate scalable backend services in TypeScript/Node on Kubernetes/AWS

Required qualifications

• 6+ years building production-grade backend systems
• Hands-on experience shipping LLM-powered features to production
• An evaluation mindset with comfort in statistics
• Track record of debugging distributed systems in production
• Fluency with agentic coding tools like Claude Code or Cursor
• Ability to pull own numbers, design experiments, and measure impact

About the company

Lemonade is building the future of insurance with AI at the center.